STIGQter: STIG Summary: Arista MLS EOS 4.X Router Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 02 Apr 2025:

The out-of-band management (OOBM) Arista gateway router must be configured to forward only authorized management traffic to the Network Operations Center (NOC).

DISA Rule

SV-256023r991786_rule

Vulnerability Number

V-256023

Group Title

SRG-NET-000205-RTR-000010

Rule Version

ARST-RT-000420

Severity

CAT II

CCI(s)

• CCI-001097 - Monitor and control communications at the external managed interfaces to the system and at key managed interfaces within the system.
• CCI-004931 - Establish organization-defined alternate communications paths for system operations organizational command and control.

Weight

10

Fix Recommendation

This requirement is not applicable for the DODIN backbone.

Configure filters based on port, source IP address, and destination IP address to permit only authorized management traffic into IPsec tunnels or the OOBM interface used for forwarding management data.

Step 1: To configure an ACL to allow only management traffic to be forwarded through the OOBM interface or IPsec tunnel, execute the command "sh ip access-list".

ip access-list OOBM_to_MGMT
10 permit tcp 10.10.10.0/24 host 10.20.10.1 eq ssh
20 permit ip 10.10.10.0/24 192.168.10.0/24
30 permit udp 10.20.20.0/24 any eq bootps snmp

Step 2: To apply the ACL outbound on the OOBM interface, execute the command "sh run int Eth YY".

interface ethernet 1
description OOBM to MGMT link
ip access-group OOBM_to_MGMT out

Check Contents

This requirement is not applicable for the DODIN backbone.

Review the network topology diagram to determine connectivity between the managed network and the NOC.

Review the OOBM gateway router configuration to validate the path that the management traffic traverses.

Step 1: To verify only management traffic is forwarded through the OOBM interface or IPsec tunnel, execute the command "sh ip access-list".

ip access-list OOBM_to_MGMT
10 permit tcp 10.10.10.0/24 host 10.20.10.1 eq ssh telnet
20 permit ip 10.10.10.0/24 192.168.10.0/24
30 permit udp 10.20.20.0/24 any eq bootps snmp

Step 2: To verify the ACL is applied outbound on the OOBM interface, execute the command "sh run int Eth YY".

interface ethernet 1
description OOBM to MGMT link
ip access-group OOBM_to_MGMT out

If traffic other than authorized management traffic is permitted through the OOBM interface or IPsec tunnel, this is a finding.

Vulnerability Number

V-256023

Documentable

False

Rule Version

ARST-RT-000420

Severity Override Guidance

This requirement is not applicable for the DODIN backbone.

Review the network topology diagram to determine connectivity between the managed network and the NOC.

Review the OOBM gateway router configuration to validate the path that the management traffic traverses.

Step 1: To verify only management traffic is forwarded through the OOBM interface or IPsec tunnel, execute the command "sh ip access-list".

ip access-list OOBM_to_MGMT
10 permit tcp 10.10.10.0/24 host 10.20.10.1 eq ssh telnet
20 permit ip 10.10.10.0/24 192.168.10.0/24
30 permit udp 10.20.20.0/24 any eq bootps snmp

Step 2: To verify the ACL is applied outbound on the OOBM interface, execute the command "sh run int Eth YY".

interface ethernet 1
description OOBM to MGMT link
ip access-group OOBM_to_MGMT out

If traffic other than authorized management traffic is permitted through the OOBM interface or IPsec tunnel, this is a finding.

Check Content Reference

M

Target Key

5513